package com.atguigu.gulimall.order.service.impl;

import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.order.dao.OrderItemDao;
import com.atguigu.gulimall.order.entity.OrderEntity;
import com.atguigu.gulimall.order.entity.OrderItemEntity;
import com.atguigu.gulimall.order.entity.OrderReturnReasonEntity;
import com.atguigu.gulimall.order.service.OrderItemService;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.rabbitmq.client.Channel;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.Map;


/**
 * @author xiaoping
 */
@RabbitListener(queues = {"hello-java-queue"})
@Service("orderItemService")
public class OrderItemServiceImpl extends ServiceImpl<OrderItemDao, OrderItemEntity> implements OrderItemService {

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<OrderItemEntity> page = this.page(
                new Query<OrderItemEntity>().getPage(params),
                new QueryWrapper<OrderItemEntity>()
        );

        return new PageUtils(page);
    }

    /**
     * queues:声明需要监听的所有队列
     * message:  org.springframework.amqp.core.Message
     * 参数可以写一下类型
     *  1，Message message:原生消息详细信息。头+体
     *  2，T<发送的消息类型> : OrderReturnReasonEntity content
     *  3,Channel channel: 当前传输数据的通道
     *
     *  Queue: 可以很多人都来监听，只要收到消息，队列删除消息，而且只能到一个收到此消息
     *  场景：
     *      1,订单服务启动多个：同一个消息，只能有一个客户端收到
     *      2,只有一个消息完全处理完，方法运行结束，我们就可以接收到下一个消息
     *
    */
    @RabbitHandler
    public void recieveMessage(Message message, OrderReturnReasonEntity content, Channel channel){
        System.out.println("接收到消息...内容：" + content);
        //{"id":1,"name":"哈哈","sort":null,"status":null,"createTime":1593747485968}
        byte[] body = message.getBody();
        //消息头属性信息
        MessageProperties properties = message.getMessageProperties();
        System.out.println("content消息处理完成=>" + content.getName());
        //channel 内按顺序自增
        long deliveryTag = message.getMessageProperties().getDeliveryTag();
        System.out.println("deliveryTag==>" + deliveryTag);

        //签收消息,非批量模式
        try {
            if (deliveryTag%2 == 0){
                channel.basicAck(deliveryTag,false);
                System.out.println("签收了消息..." + deliveryTag);
            }else {
                //退货
                //basicNack(long deliveryTag（标签）, boolean multiple(是否批量), boolean requeue（是否重新入队列,false:直接丢弃队列消息）)
                channel.basicNack(deliveryTag, false,false );
                //basicReject(long deliveryTag, boolean requeue)
//                channel.basicReject(, );
                System.out.println("没有签收消息..." + deliveryTag);
            }

        } catch (IOException e) {
            log.error("网络中断,channel管道异常！");
            e.printStackTrace();
        }

    }



    @RabbitHandler
    public void recieveMessage2(OrderEntity order){
        System.out.println("接收到消息...内容：" + order);
    }


}
